PS3V Switching Power Supplies
For details on mounting, wiring, and circuit examples, see the instruction manual from the below URL.
URL: https://product.idec.com/?product=PS3V
Instructions
Notes for installation
1. When mounting the PS3V, see page
7
.
2. See page
7
and
8
for mounting hole layout.
3. Use M3 or M4 screw as mounting screws. The tightening torque of
the mounting screw is 0.49N·m.
Power supply chassis
Mounting panel
Mounting screw
6mm max.
(PS3V-015
:
3.5mm max.)
4. Do not close the openings of the switching power supply. Ensure
proper heat dissipation by convection.
5. Maintain a minimum of 20 mm clearance around the switching
power supply.
6. When derating of the output does not work, provide forced air-
cooling.
7. Make sure to wire the ground terminal correctly.
8. Use copper wire only. In addition, refer to the below table to select
wire types and number of wires.
Terminal
Wire size (Allowable current)
Wire type
Input
AWG18 to 14
Copper, solid/stranded
Output
AWG18 to 14
(AWG18-7A, AWG16-10A,
AWG14-15A
• Cross section - AWG18: 0.82mm
2
, AWG16: 1.31mm
2
, AWG14: 2.08mm
2
• See page
11
for Push-in type
9. Recommended tightening torque of terminal screws: 0.8 N·m
(PS3V-015
: 0.5N·m)
Adjustment of output voltage
The output voltage can be adjusted within ±10% of the rated output
voltage by using the V.ADJ control. Turning the V.ADJ clockwise
increases the output voltage. Turning counterclockwise decreases the
output voltage. Note that overvoltage protection may function when
output voltage is increased.
Overcurrent protection
The output voltage drops automatically when an overcurrent flows,
resulting in intermittent operation. Normal voltage is automatically
restored when the load returns to normal condition. However,
overcurrent for a prolonged period of time or short-circuit causes the
internal elements to deteriorate or break down.
Overvoltage protection
• PS3V-015
:
Voltage limit and auto-recovery method. The switching power supplies
operate normally when voltage returns to normal.
• PS3X-030
, -050
, -100
, -150
:
The output is turned off or intermittent operation when an overvoltage
is applied. When the output voltage has dropped due to an overvoltage,
turn the input off, and after one minute, turn the input on again.
Insulation/Dielectric test
When performing an insulation/dielectric test, short the input (between
AC) and output (b and –). Do not apply or interrupt the voltage
suddenly, otherwise surge voltage may be generated and the power
supply may be damaged.
Noise
Small acoustic noise inside the PS3V may be heard depending on the
input voltage and load, but the performance of the PS3V is not affected.
Series operation
The following series operation is allowed. In (b) series operation,
connect Schottky barrier diodes. Choose (a) series operation when
using the PS3V as positive and negative output power supply. Insert
a Shottky barrier diode for loads such as operational amplifier where
outputs of two power supplies may be connected in series (Load 3).
Select a Schottky diode in consideration of the rated current.
L
N
L
N
+V
–V
L
N
+V
–V
Load
(a)
L
N
L
N
+V
–V
L
N
+V
–V
Load 3
(b)
Load 1
Load 2
Parallel operation
Parallel operation is not possible to increase the output capacity,
because the internal elements and load may be damaged.
Backup operation is a connection method of two switching power
supplies in parallel for emergency. Normally one switching power
supply has a sufficient output. If one switching power supply fails,
another one operates to continue the output. Make sure that the sum
of power consumption by load and diode is not greater than the rated
wattage (rated voltage × rated current) of one switching power supply.
The current of the diode that is used must be more than double the
output current of PS3V. Take heat dissipation into consideration.
+
–
IN
AC
OUT
+
–
IN
OUT
Load
D
D
Rust and scratches on metal parts
Hot-dip galvanized steel and bonderized steel are used for the PS3V.
Rust on the edge and scratches on the surfaces may be developed
depending on the storage condition, but the performance of the PS3V
is not affected.
10